Fix line-based role context resolution and warn on invalid jarPath

- Role property keys at indent 4 (e.g. run-scripts:) now correctly
  resolve to ROLE_KEY instead of ROLE_SCRIPT_REF in the fallback path
- Host list entries under roles now resolve to ROLE_HOST_REF in the
  fallback path, matching the tree-based logic
- Show warning when configured qdup.lsp.jarPath does not exist instead
  of silently falling back

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: stalep

qDup-lsp/src/main/java/io/hyperfoil/tools/qdup/lsp/CursorContextResolver.java

@@ -240,16 +240,19 @@ private YamlContext resolveFromLines(QDupDocument document, int line, int charac
                 return YamlContext.ROLE_NAME;
             }
             if (indent == 4) {
-                String key = trimmed.split(":")[0].trim();
-                if (key.endsWith("-scripts")) {
-                    return YamlContext.ROLE_SCRIPT_REF;
-                }
+                // At indent 4 we are on the role property key itself (e.g. "run-scripts:"),
+                // which should always be treated as ROLE_KEY.
                 return YamlContext.ROLE_KEY;
             }
-            // Inside a role property
+            // Inside a role property — resolve based on nearest parent key
             String roleKey = findNearestKey(document, line, 4);
-            if (roleKey != null && roleKey.endsWith("-scripts")) {
-                return YamlContext.ROLE_SCRIPT_REF;
+            if (roleKey != null) {
+                if (roleKey.endsWith("-scripts")) {
+                    return YamlContext.ROLE_SCRIPT_REF;
+                }
+                if ("hosts".equals(roleKey)) {
+                    return YamlContext.ROLE_HOST_REF;
+                }
             }
             return YamlContext.ROLE_KEY;
         }

vscode/src/extension.ts

@@ -53,9 +53,19 @@ async function resolveServerOptions(context: ExtensionContext): Promise<ServerOp
 
     // 1. User-configured JAR path
     const jarPath = config.get<string>('jarPath', '');
-    if (jarPath && fs.existsSync(jarPath)) {
-        const java = findJava();
-        return { command: java, args: ['-jar', jarPath] };
+    if (jarPath) {
+        if (fs.existsSync(jarPath)) {
+            const java = findJava();
+            return { command: java, args: ['-jar', jarPath] };
+        }
+        window.showWarningMessage(
+            `Configured qDup LSP JAR not found: ${jarPath}. Falling back to other discovery methods.`,
+            'Open Settings'
+        ).then(selection => {
+            if (selection === 'Open Settings') {
+                commands.executeCommand('workbench.action.openSettings', 'qdup.lsp.jarPath');
+            }
+        });
     }
 
     // 2. Bundled JAR in extension's server/ directory